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United States. Patent Office, ["Fastop clutch with friction spring (Nygard, et al)," 1943 October], [2000-06-20_container_025]. Museum of Flight Digital Collections, accessed 15/10/2026, https://digitalcollections.museumofflight.org/nodes/view/5013




![["Fastop clutch with friction spring (Nygard, et al)," 1943 October] ["Fastop clutch with friction spring (Nygard, et al)," 1943 October]](/img/placeholder.gif?1791407027)